Inflator pump and air suspension device

Abstract

The utility model relates to an inflator pump and an air suspension device. The inflator pump comprises a supporting body, a first magnet, a driving shaft and a cylinder body. The driving shaft is slidably connected to the supporting body in the axial direction. The driving shaft is connected with a second magnet. Magnetic fields generated by the second magnet and the first magnet form magnetic coupling. The cylinder body is provided with an airflow channel, and a piston body sliding in the axial direction is contained in the cylinder body. The piston body is connected to the driving shaft, and a cavity is defined by the piston body and the cylinder body. The airflow channel communicates with the cavity and is used for outputting pressurized airflow to an external device. When the piston body slides towards one direction, the space of the cavity is reduced, and therefore gas in the cavity can be output outwards through the gas flow channel. Due to the fact that the driving shaft is arranged in a sliding mode relative to the supporting body in the axial direction, and the piston body is contained in the cylinder body in a sliding mode in the axial direction, a movable joint point does not need to be arranged for connection between the driving shaft and the piston body, noise generated by friction is reduced, and the use experience of the inflator pump is improved.

Description

Technical Field

[0001] This application relates to the technical field of inflation, and particularly to an air pump and an air suspension device. Background Art

[0002] In life or production, inflation devices are required in many situations. For example, when the air pressure of a vehicle tire is insufficient, an inflation device is needed to supplement gas to restore the normal air pressure of the tire.

[0003] Traditional inflation devices generally use the output shaft of a motor to drive a crankshaft to rotate. During the rotation of the crankshaft, a piston is driven by a connecting rod, causing the piston to reciprocate within a cylinder block. However, due to the existence of multiple movable joint points between the output shaft of the motor and the piston, there is a lot of friction, so traditional inflation devices often generate significant noise during operation, resulting in a poor user experience of the inflation device. Utility Model Content

[0004] Based on this, the present utility model provides an air pump and an air suspension device that can solve or at least mitigate the above technical problems.

[0005] The present utility model provides an air pump, comprising:

[0006] A support body;

[0007] A first magnet, connected to the support body;

[0008] A drive shaft, slidably connected to the support body along the axial direction and connected with a second magnet; at least one of the second magnet and the first magnet generates an alternating magnetic field under the action of an electric current, and the second magnet and the first magnet form a magnetic coupling; and

[0009] A cylinder block, provided with an air flow channel, and internally accommodating a piston body that slides along the axial direction; the piston body is connected to the drive shaft, and encloses a chamber with the cylinder block; the air flow channel communicates with the chamber and is used to output pressurized air flow to an external device.

[0010] In the above-mentioned air pump, when the current passing through the first magnet changes regularly and an alternating magnetic field is generated near the first magnet, the second magnet is subjected to a periodically changing magnetic force, even if the direction or the duration period of the magnetic force received by the second magnet changes. Since the drive shaft is slidably connected to the support body and the second magnet is connected to the drive shaft, when the magnetic force received by the second magnet is substantially parallel to the axial direction, the second magnet can drive the drive shaft to reciprocate axially. Since the piston body is connected to the drive shaft and is slidably disposed in the cylinder body along the axial direction, when the drive shaft slides relative to the support body, the piston body can synchronously slide in the cylinder body. Since the piston body and the cylinder body enclose a chamber, when the piston body slides in one direction, the space of the chamber shrinks, so that the gas in the chamber can output a pressurized air flow through the air flow channel to inflate an external device, thereby increasing the internal air pressure of the external device. Since the drive shaft is slidably disposed relative to the support body along the axial direction and the piston body is slidably disposed in the cylinder body along the axial direction, the connection between the drive shaft and the piston body does not need to be provided with movable joint points, reducing the noise generated by friction and being beneficial to improving the use experience of the air pump.

[0011] In one embodiment, it includes at least two of the above-mentioned cylinder bodies; the at least two cylinder bodies are axially disposed on both sides of the support body.

[0012] In one embodiment, the central axes of the at least two cylinder bodies are arranged to coincide.

[0013] In one embodiment, it further includes a bottom plate; the support body and the at least two cylinder bodies are fixedly connected to the bottom plate.

[0014] In one embodiment, it further includes a air pressure detection member having an induction end; at least the induction end of the air pressure detection member is received in a detection channel, and the detection channel communicates with the air flow channel.

[0015] In one embodiment, it further includes an output joint connected to the cylinder body; the output joint and the cylinder body respectively form the boundary of the air flow channel, and the output joint is downstream of the cylinder body in the air flow channel; the detection channel is provided in the output joint; the air pressure detection member is connected to the output joint.

[0016] In one embodiment, it further includes a cover plate; a side seat portion is provided outside the output joint; the cover plate and the side seat portion enclose at least part of the space for receiving the air pressure detection member; the air pressure detection member includes a air pressure sensor.

[0017] In one embodiment, a valve core and a closing and resetting member are further included; the valve core is movably arranged in the air flow channel along the extending direction of the air flow channel; the boundary of the air flow channel has a circumferential limiting surface arranged along the outer circumferential side of the air flow channel, and the valve core abuts against the circumferential limiting surface along the upstream direction; the closing and resetting member is used for applying a reset acting force pointing to the upstream of the air flow channel to the valve core.

[0018] In one embodiment, the piston body includes a piston main core connected to the driving shaft and a flexible ring sleeved on the outer circumferential side of the piston main core; the outer peripheral edge of the flexible ring abuts against the inner circumferential surface of the cylinder block; a one-way ventilation structure is formed on the outer periphery of the flexible ring.

[0019] In one embodiment, the support body encloses an internal space; the first magnet and the second magnet are accommodated in the support body.

[0020] The utility model provides an air pump, comprising:

[0021] A support body;

[0022] A first magnet, connected to the support body, generating an alternating magnetic field under the action of an electric current;

[0023] A driving shaft, slidably connected to the support body along the axial direction, at least partially having magnetism and forming a magnetic coupling with the first magnet; and

[0024] A cylinder block, provided with an air flow channel, and internally accommodating a piston body sliding along the axial direction; the piston body is connected to the driving shaft, and encloses a chamber with the cylinder block; the air flow channel communicates with the chamber and is used for outputting pressurized air flow to an external device.

[0025] The utility model provides an air suspension device, comprising the air pump of any one of the above embodiments. Description of the Drawings

[0026] Figure 1 Is a three-dimensional schematic diagram of the air pump according to an embodiment of the present application.

[0027] Figure 2 Is Figure 1 The exploded schematic diagram of the air pump shown.

[0028] Figure 3 Is Figure 1 The partial three-dimensional sectional view of the air pump shown.

[0029] Figure 4A Is Figure 1 The structural schematic diagram inside the support body of the air pump shown.

[0030] Figure 4BSchematic diagram of the structure inside the support body of an air pump according to an embodiment of the present application.

[0031] Figure 5 is Figure 2 Exploded view of the piston body of the air pump shown.

[0032] Figure 6 is Figure 2 Stereoscopic cross-sectional view of the piston body of the air pump shown.

[0033] Figure 7 is Figure 2 Exploded view of the output joint, valve core and gasket of the air pump shown.

[0034] Figure 8 is Figure 2 Stereoscopic cross-sectional view of the output joint, valve core and gasket of the air pump shown.

[0035] Reference numerals: 100, air pump; 20, support body; 21, bottom plate; 22, buffer member; 23, driving and resetting member; 30, first magnet; 40, driving shaft; 41, second magnet; 50, cylinder block; 51, chamber; 52, air flow channel; 521, first section; 53, gasket; 531, circumferential limiting surface; 60, piston body; 61, piston main core; 62, flexible ring; 63, limiting groove; 64, annular opening; 70, air pressure detecting member; 71, circuit board; 80, output joint; 81, detecting channel; 82, side seat portion; 83, cover plate; 84, tubular portion; 841, second section; 842, stepped surface; 85, flange portion; 86, sealing gasket; 87, valve core; 88, blocking and resetting member; F2, upstream direction; F3, downstream direction. Detailed implementation manners

[0036] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0037] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] The technical solutions provided by the embodiments of the present application will be described below with reference to the accompanying drawings.

[0040] Figures 1 to 8 An air pump 100 according to at least one embodiment of the present invention is shown. The air pump 100 can be used to inflate the tires of a vehicle. The vehicle can be at least an automobile or a bicycle. Specifically, the air pump 100 can also be used to inflate an external device that needs to increase the internal air pressure.

[0041] In some embodiments, referring to Figure 1 、 Figure 2 and Figure 4A , the air pump 100 includes: a support body 20, a first magnet 30, a drive shaft 40, and a cylinder body 50. The first magnet 30 is connected to the support body 20. The drive shaft 40 is slidably connected to the support body 20 in the axial direction. The drive shaft 40 is connected with a second magnet 41. At least one of the second magnet 41 and the first magnet 30 generates an alternating magnetic field under the action of an electric current. The second magnet 41 and the first magnet 30 form a magnetic coupling. The cylinder body 50 is provided with an air flow channel 52, and a piston body 60 that slides in the axial direction is accommodated inside the cylinder body 50. The piston body 60 is connected to the drive shaft 40, and the piston body 60 and the cylinder body 50 enclose a chamber 51. The air flow channel 52 communicates with the chamber 51 and is used to output pressurized air flow to an external device.

[0042] For the air pump 100 of the present application, when the current passing through the first magnet 30 or the second magnet 41 changes regularly, an alternating magnetic field is generated between the first magnet 30 and the second magnet 41. A periodically changing magnetic force acts between the first magnet 30 and the second magnet 41, that is, the direction or the duration of the magnetic force received by the second magnet 41 changes periodically. Since the drive shaft 40 is slidably connected to the support 20 and the second magnet 41 is connected to the drive shaft 40, when the magnetic force received by the second magnet 41 is substantially parallel to the axial direction, the second magnet 41 can drive the drive shaft 40 to slide back and forth along the axial direction. Since the piston body 60 is connected to the drive shaft 40 and is slidably disposed in the cylinder body 50 along the axial direction, when the drive shaft 40 slides relative to the support 20, the piston body 60 can slide synchronously in the cylinder body 50. Since the piston body 60 and the cylinder body 50 enclose a chamber 51, when the piston body 60 slides in one direction, the space of the chamber 51 is reduced, so that the gas in the chamber 51 can be output as a pressurized air flow through the air flow channel 52 to inflate an external device, thereby increasing the internal air pressure of the external device. Since the drive shaft 40 is slidably disposed relative to the support 20 along the axial direction and the piston body 60 is slidably disposed in the cylinder body 50 along the axial direction, there is no need to provide a movable joint between the drive shaft 40 and the piston body 60, reducing the noise generated by friction and being beneficial to improving the use experience of the air pump 100.

[0043] Specifically, in combination with Figure 1 and Figure 3 shown, the axial direction is parallel to the arrow F1.

[0044] In some embodiments, in combination with Figure 4A shown, the support 20 encloses an internal space. The first magnet 30 and the second magnet 41 are disposed in the support 20. Specifically, the first magnet 30 is positioned and disposed in the support 20, and the second magnet 41 moves in the support 20 along with the drive shaft 40.

[0045] In some embodiments, the first magnet 30 may be fixedly magnetic without being energized. For example, the first magnet 30 adopts a permanent magnet structure. Specifically, the permanent magnet structure is at least partially made of a permanent magnet material.

[0046] In some other embodiments, the first magnet 30 may also be magnetic under the action of electricity. For example, the first magnet 30 adopts an electromagnet structure. Specifically, the electromagnet structure at least includes a coil. Further, the electromagnet structure includes a coil and an iron core.

[0047] In some embodiments, the second magnet 41 may be fixedly magnetic without being energized. For example, the second magnet 41 adopts a permanent magnet structure.

[0048] In some other embodiments, the second magnet 41 can also have magnetism under the action of energization. For example, the second magnet 41 adopts an electromagnet structure. Specifically, a conductor conducts current to the coil structure in the second magnet 41, so that the second magnet 41 has a fixed magnetic field or a periodically changing magnetic field. Further, the drive shaft 40 can be formed with a hollow structure, so that the conductor outside the support body 20 can penetrate into the drive shaft 40, and then the conductor conducts current to the coil structure in the second magnet 41. Further, a sliding conductive structure can also be formed between the drive shaft 40 and the support body 20, and this sliding conductive structure acts as a conductor to provide current for the second magnet 41.

[0049] In some embodiments, the first magnet 30 has magnetism under the action of energization. Specifically, the first magnet 30 has an active state and an inactive state. Specifically, in the active state, the first magnet 30 passes current and generates a magnetic field, or the current passing through the first magnet 30 increases, so that the magnetic field is enhanced. In the inactive state, the first magnet 30 stops being energized and the magnetic field disappears. Or, the current passing through the first magnet 30 decreases, and the generated magnetic field weakens.

[0050] In some embodiments, the first magnet 30 adopts an electromagnet structure and the second magnet 41 adopts a permanent magnet structure.

[0051] In some embodiments, the first magnet 30 adopts a permanent magnet structure and the second magnet 41 adopts an electromagnet structure.

[0052] In some embodiments, by switching the direction of the current passing through the first magnet 30, a forward magnetic field and a reverse magnetic field can be alternately generated. When the first magnet 30 generates a forward magnetic field, the magnetic force received by the second magnet 41 causes the piston body 60 to slide in the direction of the volume of the compression chamber 51. When the first magnet 30 generates a reverse magnetic field, the magnetic force received by the second magnet 41 causes the piston body 60 to slide in the direction of the volume of the expansion chamber 51.

[0053] Further, as shown in Figure 4A the air pump 100 further includes a buffer member 22. The buffer member 22 is disposed between the support body 20 and the drive shaft 40 and is used to reduce the speed of the drive shaft 40 before the drive shaft 40 finishes sliding in one direction, so as to avoid a violent collision between the drive shaft 40 or the second magnet 41 and the support body 20. Specifically, the buffer member 22 includes a spring or a rubber pad. The buffer member 22 can also be a pair of mutually repulsive magnets, one of which is connected to the support body 20 and the other is connected to the drive shaft 40. When the two magnets approach, the repulsive force between them causes the speed of the drive shaft 40 relative to the support body 20 to decrease.

[0054] Further, before the sliding of the drive shaft 40 in one direction ends, a current in the opposite direction can be applied to the first magnet 30 in advance, and the drive shaft 40 can be decelerated by the reverse magnetic force, so as to mitigate the collision between the drive shaft 40 and the support body 20. For example, when the first magnet 30 starts to generate a positive magnetic field, the magnetic force received by the second magnet 41 causes the piston body 60 to slide in the direction of the volume of the compression chamber 51. Before the piston body 60 reaches the stroke limit in the direction of the volume of the compression chamber 51, the direction of the current passing through the first magnet 30 is switched. The second magnet 41 is subjected to a magnetic force in the opposite direction, so that the speed of the drive shaft 40 in the direction of the volume of the compression chamber 51 gradually decreases, thereby mitigating the collision between the drive shaft 40 and the support body 20, and a buffer member can be omitted, simplifying the internal structure. During the sliding of the piston body 60 in the direction of the volume of the expansion chamber 51, the current passing through the first magnet 30 is switched in the reverse order to mitigate the collision between the drive shaft 40 and the support body 20.

[0055] In some embodiments, the air pump 100 further includes a drive reset member 23. The drive reset member 23 is disposed between the support body 20 and the drive shaft 40 and is used to generate a reset force on the drive shaft 40. By controlling the appearance time of the current passing through the first magnet 30, the magnetic field can alternately appear or disappear. When the magnetic field appears, the magnetic force received by the second magnet 41 overcomes the reset force generated by the drive reset member 23, causing the piston body 60 to slide in the direction of the volume of the compression chamber 51. When the magnetic field disappears, the reset force causes the piston body 60 to slide in the direction of the volume of the expansion chamber 51. It may also be that when the magnetic field appears, the magnetic force received by the second magnet 41 overcomes the reset force generated by the drive reset member 23, causing the piston body 60 to slide in the direction of the volume of the expansion chamber 51, and when the magnetic field disappears, the reset force causes the piston body 60 to slide in the direction of the volume of the compression chamber 51. Specifically, the drive reset member 23 includes a spring.

[0056] In some embodiments, the first magnet 30 and the second magnet 41 adopt an electromagnet structure. During one movement cycle of the drive shaft 40, it includes a working stage and a reset stage. During the working stage, the first magnet 30 generates a magnetic field. At the same time, the second magnet 41 is in an effective state, and the magnetic force received by the second magnet 41 causes the piston body 60 to slide in the direction of the volume of the compression chamber 51 and compresses the drive reset member 23.

[0057] During the reset stage, the first magnet 30 and the second magnet 41 are in an ineffective state, and the magnetic force between them disappears or weakens. The reset force of the drive reset member 23 causes the piston body 60 to slide in the direction of the volume of the expansion chamber 51, and the compression amplitude of the drive reset member 23 gradually decreases.

[0058] In some embodiments, the first magnet 30 includes a coil.

[0059] In some other embodiments, the first magnet 30 includes a coil and an iron core disposed in the coil.

[0060] In some embodiments, in combination with Figure 3 As shown, the port of the air flow channel 52 is disposed on the side of the chamber 51 away from the piston body 60. Thus, when the depth of the cylinder block 50 is the same, the sliding stroke of the piston body 60 during the compression of the chamber 51 can be increased, and the volume of the pressurized air flow generated during each compression of the chamber 51 can be increased.

[0061] In some embodiments, in combination with Figure 3 As shown, the cylinder block 50 has a semi-open structure with an open side and a closed side, which is beneficial to accommodating the piston body 60 into the cylinder block 50. Specifically, the open side of the cylinder block 50 faces the support body 20. The port of the air flow channel 52 is disposed on the closed side of the cylinder block 50.

[0062] In some embodiments, in combination with Figure 1 and Figure 2 As shown, the air inflation pump 100 includes at least two cylinder blocks 50. The at least two cylinder blocks 50 are axially disposed on both sides of the support body 20. Specifically, when on one side of the support body 20, a piston body 60 slides in the direction of the volume of the compression chamber 51, on the other side of the support body 20, another piston body 60 slides in the direction of the volume of the expansion chamber 51, so that the pressurized air flow can be alternately generated by the at least two cylinder blocks 50, effectively improving the air inflation efficiency of the air inflation pump 100.

[0063] Further, the pressurized air flows output by the at least two cylinder blocks 50 can be respectively used to inflate different external devices. Further, it can also be that the pressurized air flows output by the at least two cylinder blocks 50 converge and then inflate an external device.

[0064] More specifically, both ends of the drive shaft 40 respectively pass through the outside of the support body 20, and one end of the drive shaft 40 is connected to at least one piston body 60.

[0065] In some embodiments, the central axes of the at least two cylinder blocks 50 are coaxially arranged, which is beneficial to using a straight rod-shaped drive shaft 40 and is beneficial to reducing the processing difficulty or the assembly difficulty of the drive shaft 40. Further, the central axis of the drive shaft 40 coincides with the central axis of the cylinder block 50 respectively. Further, the central axis of the piston body 60 coincides with the central axis of the cylinder block 50.

[0066] In some embodiments, in combination with Figure 1 and Figure 2As shown, the air pump 100 further includes a bottom plate 21. The support body 20 and at least two cylinder bodies 50 are positioned and connected to the bottom plate 21, so that each cylinder body 50 is in a stable position relative to the support body 20.

[0067] In some embodiments, in combination with Figure 5 and Figure 6 As shown, the piston body 60 includes a piston main core 61 connected to the drive shaft 40 and a flexible ring 62 sleeved on the outer peripheral side of the piston main core 61. The outer peripheral edge of the flexible ring 62 abuts against the inner peripheral surface of the cylinder body 50. A one-way ventilation structure is formed on the outer periphery of the flexible ring 62. Specifically, when the piston body 60 slides in the direction of compressing the volume of the compression chamber 51, the air pressure in the chamber 51 rises, and the gas pressure in the chamber 51 causes the outer peripheral edge of the flexible ring 62 to closely adhere to the inner peripheral surface of the cylinder body 50, preventing the gas in the chamber 51 from leaking through the gap between the flexible ring 62 and the inner peripheral surface of the cylinder body 50. When the piston body 60 slides in the direction of expanding the volume of the chamber 51, the air pressure in the chamber 51 drops, and the gas pressure outside the piston body 60 causes the flexible ring 62 to contract radially, and a gap appears between the outer peripheral edge of the flexible ring 62 and the inner peripheral surface of the cylinder body 50. Therefore, the gas outside the piston body 60 can be supplemented into the chamber 51 through this gap. Further, a limiting groove 63 is provided on the outer peripheral side of the piston main core 61, and the limiting groove 63 extends along the outer circumference of the piston main core 61. The flexible ring 62 is partially received in the limiting groove 63.

[0068] Specifically, along the direction of expanding the volume of the chamber 51, the outer peripheral surface of the piston body 60 is in a narrow-down transition, so as to form a one-way ventilation structure.

[0069] Specifically, an annular opening 64 is provided on the side of the flexible ring 62 facing the inside of the chamber 51, and the annular opening 64 is arranged along the circumferential direction of the flexible ring 62, so as to form a one-way ventilation structure.

[0070] In some embodiments, in combination with Figure 7 and Figure 8 As shown, the air pump 100 further includes a barometric pressure detection member 70 having an induction end. The barometric pressure detection member 70 is at least received in the detection channel 81 with the induction end, and the detection channel 81 communicates with the air flow channel 52. Therefore, the barometric pressure environment near the induction end is close to or equal to the barometric pressure environment in the air flow channel 52. Also, since the air flow channel 52 communicates with an external device, the barometric pressure environment near the induction end can roughly correspond to the barometric pressure state in the external device. Therefore, the detection by the barometric pressure detection member 70 can reflect the internal barometric pressure state in the external device.

[0071] In some embodiments, the barometric pressure detection member 70 includes a mechanical barometer. The main body of the barometric pressure detection member 70 is arranged outside the detection channel 81, and the induction end of the barometric pressure detection member 70 is received in the detection channel 81.

[0072] In some other embodiments, the air pressure detecting member 70 includes an air pressure sensor, and the air pressure detecting member 70 is received in the detection channel 81.

[0073] In some embodiments, the detection channel 81 is provided in the cylinder block 50, and the air pressure detecting member 70 is connected to the cylinder block 50.

[0074] In some embodiments, in combination with Figure 3 and Figure 7 as shown, the inflator 100 further includes an output joint 80 connected to the cylinder block 50. The output joint 80 and the cylinder block 50 respectively form the boundaries of the air flow channel 52, and the output joint 80 is located downstream of the air flow channel 52 relative to the cylinder block 50. The detection channel 81 is provided in the output joint 80. The air pressure detecting member 70 is connected to the output joint 80. Specifically, the pressurized air flow passes through the air flow channel 52 along the downstream direction F3 of the air flow channel 52. Specifically, the cylinder block 50 forms the boundary of the upstream section of the air flow channel 52, and the output joint 80 forms the boundary of the downstream section of the air flow channel 52.

[0075] Specifically, the output joint 80 is positioned and connected to the cylinder block 50. The output joint 80 is connected to the cylinder block 50 by fasteners. More specifically, the fasteners are screws.

[0076] Specifically, in combination with Figure 7 and Figure 8 as shown, the output joint 80 includes a tubular portion 84 and a flange portion 85 connected to the tubular portion 84. The flange portion 85 and the tubular portion 84 respectively define the boundaries of the air flow channel 52 in the circumferential direction. The flange portion 85 is connected to the cylinder block 50. The tubular portion 84 is provided on the side of the flange portion 85 facing away from the cylinder block 50.

[0077] In some embodiments, in combination with Figure 3 and Figure 8 as shown, the inflator 100 further includes a gasket 86, and the gasket 86 abuts between the output joint 80 and the cylinder block 50. The gasket 86 has flexibility, so as to adapt to the gap between the output joint 80 and the cylinder block 50, and prevent the pressurized air flow from leaking from the gap between the output joint 80 and the cylinder block 50. Specifically, the gasket 86 abuts between the flange portion 85 and the cylinder block 50. Further, the gasket 86 forms the boundary of the middle section of the air flow channel 52.

[0078] In some embodiments, in combination with Figure 7 and Figure 8 as shown, a side seat portion 82 is provided outside the output joint 80. Specifically, the side seat portion 82 is connected to the outside of the tubular portion 84. The detection channel 81 is provided in the tubular portion 84 and the side seat portion 82.

[0079] Further, in combination with Figure 7 and Figure 8As shown, the air pump 100 further includes a cover plate 83. The cover plate 83 and the side seat portion 82 enclose a space for accommodating at least part of the air pressure detection member 70, so as to maintain the connection between the air pressure detection member 70 and the output joint 80. Further, the air pressure detection member 70 includes an air pressure sensor, and the air pressure sensor is fixed on the circuit board 71. A part of the circuit board 71 is accommodated between the cover plate 83 and the side seat portion 82. Another part of the circuit board 71 extends out of the cover plate 83 and the side seat portion 82 to externally feedback the air pressure detection signal. More specifically, by keeping the cover plate 83 and the side seat portion 82 in close contact with the circuit board 71 respectively, the positioning of the circuit board 71 and the sealing performance are ensured.

[0080] In some embodiments, in combination with Figure 7 and Figure 8 As shown, the air pump 100 further includes a valve core 87 and a blocking and resetting member 88. The valve core 87 is movably arranged in the air flow channel 52 along the extending direction of the air flow channel 52. The boundary of the air flow channel 52 has a circumferential limiting surface 531 arranged along the outer circumferential side of the air flow channel 52, and the valve core 87 abuts against the circumferential limiting surface 531 along the upstream direction F2. The blocking and resetting member 88 is used to apply a resetting force to the valve core 87 pointing upstream of the air flow channel 52. Specifically, when the piston body 60 slides in the direction of expanding the volume of the chamber 51, the air pressure in the chamber 51 drops. The valve core 87 abuts against the circumferential limiting surface 531 under the action of the resetting force, so that the air flow channel 52 is in a blocked state, thereby preventing the gas in the external device from flowing back into the chamber 51 through the air flow channel 52. When the piston body 60 slides in the direction of compressing the volume of the chamber 51, the air pressure in the chamber 51 rises, and the pressure generated by the pressurized air flow on the valve core 87 is greater than the resetting force of the blocking and resetting member 88 on the valve core 87, so that the valve core 87 is pushed by the pressurized air flow to leave the circumferential limiting surface 531, and the air flow channel 52 is in an open state, thereby being able to output pressurized air flow to the external device.

[0081] Specifically, the downstream direction F3 is set opposite to the upstream direction F2. Specifically, along the downstream direction F3 of the air flow channel 52, the air flow channel 52 can be at least divided into a first section 521 and a second section 841 arranged in sequence, and the inner diameter of the first section 521 is smaller than that of the second section 841. The circumferential limiting surface 531 is arranged between the first section 521 and the second section 841. More specifically, along the upstream direction F2 of the air flow channel 52, the circumferential limiting surface 531 is arranged in a narrow-down transition manner. Further, a part of the surface of the valve core 87 is arranged in a narrow-down transition along the upstream direction F2 of the air flow channel 52, so that when the valve core 87 contacts the circumferential limiting surface 531, it can guide the valve core 87 to align with the circumferential limiting surface 531, and when the air flow channel 52 is in a blocked state, the valve core 87 can obtain a greater gas pressure and closely adhere to the circumferential limiting surface 531.

[0082] Specifically, the inner diameter of the second section 841 is greater than the outer diameter of the valve core 87 , so that when the pressurized airflow is output, the pressurized airflow can pass through the gap between the valve core 87 and the inner wall of the airflow channel 52 .

[0083] Furthermore, the circumferential limit surface 531 is disposed on the inner circumference of the sealing gasket 86. Since the sealing gasket 86 has a certain flexibility, it can adapt to the shape of the surface of the valve core 87 and fully fit the valve core 87. More specifically, the first section 521 of the airflow channel 52 is disposed on the cylinder body 50, and the second section 841 of the airflow channel 52 is disposed on the output connector 80.

[0084] Furthermore, when a structure for preventing gas backflow is provided in the external device, the valve core 87 and the blocking reset member 88 of the inflation pump 100 may be omitted.

[0085] Specifically, the occlusion reset member 88 may be a spring. Further, the boundary of the airflow channel 52 also has a stepped surface 842 arranged along the outer peripheral side of the airflow channel 52, and the stepped surface 842 is located downstream of the airflow channel 52 relative to the circumferential limit surface 531. The occlusion reset member 88 abuts between the stepped surface 842 and the valve core 87.

[0086] Specifically, the occlusion reset member 88 may also be a pair of repelling magnets, one of which is positioned and installed in the air flow channel 52 , and the other is connected to the valve core 87 .

[0087] Specifically, under the effect of the magnetic property of the valve core 87 , the occlusion reset member 88 may also be a single magnet, and the occlusion reset member 88 and the valve core 87 repel each other magnetically.

[0088] In other embodiments, in combination Figure 1 , Figure 2 and Figure 4B As shown, the air pump 100 includes: a support body 20, a first magnet 30, a drive shaft 40 and a cylinder body 50. The first magnet 30 is connected to the support body 20, and the first magnet 30 generates an alternating magnetic field under the action of electric current. The drive shaft 40 is axially slidably connected to the support body 20, and the drive shaft 40 is at least partially magnetic and forms a magnetic coupling with the first magnet 30. The cylinder body 50 is provided with an air flow channel 52, and a piston body 60 that slides axially is accommodated inside the cylinder body 50. The piston body 60 is connected to the drive shaft 40, and the piston body 60 and the cylinder body 50 enclose a chamber 51. The air flow channel 52 is connected to the chamber 51 and is used to output a pressurized air flow to an external device.

[0089] Specifically, when the current passing through the first magnet 30 changes regularly, a periodically changing magnetic force is formed between the first magnet 30 and the drive shaft 40, and the direction or the duration period of the magnetic force received by the drive shaft 40 changes periodically. Since the drive shaft 40 is slidably connected to the support 20, when the magnetic force received by the drive shaft 40 is substantially parallel to the axial direction, the drive shaft 40 reciprocates axially. Since the piston body 60 is connected to the drive shaft 40 and is axially slidably disposed in the cylinder block 50, when the drive shaft 40 slides relative to the support 20, the piston body 60 can synchronously slide in the cylinder block 50.

[0090] More specifically, as shown in Figure 4B , in the effective state, the first magnet 30 passes an electric current and generates a magnetic field. The drive shaft 40 slides in the direction of compressing the drive return member 23 under the action of the magnetic force, and compresses the space of one of the chambers 51.

[0091] As shown in Figure 4B , in the failure state, the magnetic field of the first magnet 30 disappears or weakens. The return force formed by the compression of the drive return member 23 causes the drive shaft 40 to slide in the opposite direction, and the originally compressed chamber 51 gradually expands until a part of the drive shaft 40 abuts against the buffer member 22.

[0092] More specifically, when the drive shaft 40 has magnetism, the first magnet 30 can be magnetic under the action of electric current and can alternately generate a positive magnetic field and a negative magnetic field, so that the drive shaft 40 slides back and forth under the action of the magnetic force, and the drive return member 23 can be omitted. Further, when the first magnet 30 generates a positive magnetic field, the magnetic force received by the drive shaft 40 causes one of the piston bodies 60 to slide in the direction of compressing the volume of the chamber 51. When the first magnet 30 generates a negative magnetic field, the magnetic force received by the drive shaft 40 causes one of the piston bodies 60 to slide in the direction of expanding the volume of the chamber 51.

[0093] Specifically, the drive shaft 40 can be partially made of a permanent magnet material, and the drive shaft 40 can also be entirely made of a permanent magnet material. Specifically, the drive shaft 40 can be formed by assembling several parts, and one or more of the parts are made of a permanent magnet material.

[0094] The present application also provides an air suspension device, which can be at least used for the suspension system of a vehicle.

[0095] In some embodiments, the air suspension device includes an air spring, a shock absorber, and the air pump 100 in any of the above embodiments. The air spring has elasticity, and the air spring is also provided with a variable-volume chamber. The air pump 100 is connected to the air spring, and the air pump 100 is used to inject a pressurized air flow into the chamber. The shock absorber is connected to the air spring, and the shock absorber is used to damp the expansion and contraction of the air spring.

[0096] Specifically, the air spring includes a rubber airbag. The rubber airbag is filled with compressed air so that the rubber airbag can maintain a certain shape. When the vehicle is running, an air inflation pump 100 can be used to inject a pressurized air flow into the air spring or deflate the air spring to change the internal air pressure of the air spring, thereby changing the stiffness of the air spring to adjust the vehicle body height or the shock absorption effect.

[0097] The above embodiments are only descriptions of the preferred embodiments of the present application and do not limit the scope of the present application. Without departing from the design spirit of the present application, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. An inflator, characterized in that, Comprising: A support body; A first magnet, connected to the support body; A drive shaft, slidably connected to the support body along the axial direction, and connected with a second magnet; At least one of the second magnet and the first magnet generates an alternating magnetic field under the action of an electric current, and the second magnet and the first magnet form a magnetic coupling; And A cylinder block, provided with an air flow channel, and internally accommodating a piston body that slides along the axial direction; the piston body is connected to the drive shaft, and encloses a chamber with the cylinder block; the air flow channel communicates with the chamber and is used to output pressurized air flow to an external device.

2. The air pump according to claim 1, wherein Comprising at least two of the cylinder blocks; the at least two cylinder blocks are axially arranged on both sides of the support body.

3. The inflator according to claim 2, wherein The central axes of the at least two cylinder blocks are arranged to coincide.

4. The inflator according to claim 2, characterized in that, Further comprising a bottom plate; the support body and the at least two cylinder blocks are positioned and connected to the bottom plate.

5. The inflator according to claim 1, wherein Further comprising a pneumatic pressure detection member having an induction end; at least the induction end of the pneumatic pressure detection member is accommodated in a detection channel, and the detection channel communicates with the air flow channel.

6. The inflator according to claim 5, characterized in that, Further comprising an output joint connected to the cylinder block; the output joint and the cylinder block respectively form the boundary of the air flow channel, and the output joint is located downstream of the air flow channel relative to the cylinder block; the detection channel is arranged in the output joint; the pneumatic pressure detection member is connected to the output joint.

7. The inflator according to claim 6, wherein, Further comprising a cover plate; a side seat portion is arranged outside the output joint; the cover plate and the side seat portion enclose at least part of a space for accommodating the pneumatic pressure detection member; the pneumatic pressure detection member includes a pneumatic pressure sensor.

8. The inflator according to claim 1, characterized in that Further comprising a valve core and a closing and resetting member; the valve core is movably arranged in the air flow channel along the extending direction of the air flow channel; the boundary of the air flow channel has a circumferential limiting surface arranged along the outer peripheral side of the air flow channel, and the valve core abuts against the circumferential limiting surface along the upstream direction; the closing and resetting member is used to apply a reset acting force pointing to the upstream of the air flow channel to the valve core.

9. The inflator according to claim 1, wherein The piston body includes a piston main core connected to the drive shaft and a flexible ring sleeved on the outer peripheral side of the piston main core; the outer peripheral edge of the flexible ring abuts against the inner peripheral surface of the cylinder block; a one-way air vent structure is formed on the outer periphery of the flexible ring.

10. The inflator according to claim 1, characterized in that, The support body encloses an internal space; the first magnet and the second magnet are accommodated in the support body.

11. An air pump, characterized in that, Comprising: A support body; A first magnet, connected to the support body, and generating an alternating magnetic field under the action of an electric current; A drive shaft, slidably connected to the support body along the axial direction, at least part of which has magnetism and forms a magnetic coupling with the first magnet; And A cylinder block, provided with an air flow channel, and internally accommodating a piston body that slides along the axial direction; the piston body is connected to the drive shaft, and encloses a chamber with the cylinder block; the air flow channel communicates with the chamber and is used to output pressurized air flow to an external device.

12. An air suspension device, characterized in that, Comprising the air inflation pump according to any one of claims 1 to 11.

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